Swing arm bearings

Hi guys. I've bought the proactionsport swing arm bearings kit. I am having issues with it fitting back into the swing arm location on the engine block. The spacers are being pushed out by the seals. I have removed the seals and tried to fit it but it's almost like the bearings are too big. They are pressed together as far as they will go with equal distance either side to take the spacers but they still won't fit. Anyone else had any issues with this? It's difficult to measure against the old bearings as they fell apart when I took them out.